facial gesture vs scowl

facial gesture and scowl both are nouns.

Word	Noun	Adjective	Verb	Adverb
facial gesture	Yes	No	No	No
scowl	Yes	No	Yes	No

As nouns, scowl is a hyponym of facial gesture; that is, scowl is a word with a more specific, narrower meaning than facial gesture:

Other hyponyms of facial gesture include emoticon, gape, face, grimace, frown, grin, grinning, smile, smiling, laugh, snarl, straight face, wink, wince.

facial gesture (noun)	scowl (noun)
a gesture executed with the facial muscles	a facial expression of dislike or displeasure

facial gesture (verb)	scowl (verb)
	frown with displeasure